Specifically, the FOUR (4) Dreamlifter aircraft are model 747-400s modified to transport the major components of the 787 Dreamliners from the fabrication/assembly facilities in Japan, Italy, Charleston, NC & Wichita, KS to the 787 FINAL Assembly lines in Everett, WA & Charleston. These components are the wings & complete fuselage sections (fwd, main & aft.Currently,(July 2015) Boeing is assembling 10 787(-8 & -9)aircraft per month ...8 in Everett & 2 in Charleston. Eventually, ALL -10 787s will be assembled in Charleston. Consequently, these FOUR 747 Dreamlifters are airborne most of the time somewhere between Japan, Everett, & Italy!!!